Capital (Capital Requirements) (Details) $ in Thousands |
Jun. 30, 2026
USD ($)
numberOfRegulatoryRequirements
|
Dec. 31, 2025
USD ($)
|
|---|---|---|
| Banking Regulation, Total Capital [Abstract] | ||
| Number of Finance Agency Regulatory Capital Requirements | numberOfRegulatoryRequirements | 3 | |
| Number Of Subclasses Of Capital Stock | 2 | |
| Risk-Based Capital, Required | $ 995,565 | $ 857,373 |
| Risk-Based Capital, Actual | $ 6,251,213 | $ 4,550,222 |
| Total capital-to-asset ratio, Required | 4.00% | 4.00% |
| Total capital-to-asset ratio, Actual | 5.30% | 6.20% |
| Total regulatory capital, Actual | $ 6,251,213 | $ 4,550,222 |
| Leverage ratio - Required | 5.00% | 5.00% |
| Leverage ratio, Actual | 7.90% | 9.30% |
| Leverage capital, Required | $ 5,925,768 | $ 3,665,861 |
| Leverage capital, Actual | 9,376,820 | 6,825,333 |
| Total regulatory capital, Required | $ 4,740,614 | $ 2,932,689 |